Ngokukhawuleza kwenkqubo yoshishino, ukusetyenziswa kweevalve zaseTshayina kubunjineli kuninzi kwaye kubanzi, kwaye uhlobo lwayo kunye nenani liyanda. Ukukhethwa kweevalve zaseTshayina kuchaphazela ngokuthe ngqo ukhuseleko, ukuzinza kunye nokusebenza kakuhle kwezixhobo zoshishino, ngoko ke, indlela yokuthenga iivalve zaseTshayina ezinomgangatho omhle kunye nokusebenza okuzinzileyo kuye kwaba yinto echaphazelekayo kuninzi lwabasebenzisi. Eli nqaku liza kuxubusha iingxaki eziqhelekileyo zokuthengwa kwevalve yaseTshayina ngobunzulu, kwaye inike izisombululo ezithile, ngethemba lokubonelela ngereferensi kunye noncedo kubathengi bevalve yaseTshayina.